Field 1      Field 2      Field 3
                   -----------  -----------  -----------
  56 1752.eps      "",          "56",        "1752.eps"   key in 2
1160 trace.exe     "1160",      "trace.exe"               key in 1
 123 foo bar.pl    "123",       "foo",       "bar.pl"     key in 1

##</code><code>##

                   Field 1      Field 2      Field 3
                   -----------  -----------  -----------
56 1752.eps        "56",        "1752.eps"                key in 1
1160 trace.exe     "1160",      "trace.exe"               key in 1
123 foo bar.pl     "123",       "foo",       "bar.pl"     key in 1

##</code><code>##

                   Field 1      Field 2      Field 3      Field 4
                   -----------  -----------  -----------  -----------
   56 1752.eps     "",          "56",        "1752.eps"
 1160 trace.exe    "",          "1160",      "trace.exe"
  123 foo bar.pl   "",          "123",       "foo",       "bar.pl"